NXP QN908x User manual

QN908x

DK User Guide

Rev. 1.0 — June 2017

DK User Guide

Document information

Info

Content

Keywords

QN9080-DK, QN9080, QN9083, BLE, USB Dongle

Abstract

This document is an introduction to the QN908x DK V1.2 board

NXP Semiconductors

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DK User Guide

QN908x-DK

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Contact information

For more information, please visit: http://www.nxp.com

Revision history

Rev

Date

Description

0.1

20160818

Initial release.

0.2

20160908

Updated the figures, schematics, and PCB layout according to the QN908x DK board V1.0

and added the QN9080 QFN module board information.

0.3

20161110

Updated pictures and schematics according to the QN908x DK board V1.1, added the

current test using the DC power analyzer. Added notes about using a battery as the power

supply for the QN9080 module.

0.4

20170117

Updated pictures and schematics according to the QN908x DK board V1.2 and changed

the jumper default settings.

1.0

20170613

Public release.

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1. Introduction

The QN908x DK board is designed for the QN908x HVQFN and WLCSP package IC

evaluation and development. It is easy to evaluate QN908x’s functions and performance.

There are also some useful peripherals like the GPIOs, PMod, and Arduino interface.

The J-Link and J-Trace functions are supported for the QN908x debugging. The ISP

download function is also supported and very easy to use.

1.1 Purpose

This document introduces all functions of the QN908x DK V1.2 board and describes all

its parts in detail.

1.2 Kit contents

QN908x DK includes the following:

 QN908x DK board

 QN9080 USB dongle

 USB cable

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2. Hardware description

The QN908x DK board provides easy access to peripherals, such as the buttons and

LED. The board also provides useful interfaces, such as the USB port for UART

communication and CMSIS-DAP debugger, and the standard Arduino & Pmod

connector. The USB dongle is a Bluetooth device powered by QN9080. It acts as a

master/slave when communicating with the QN908x devices.

2.1 Hardware overview

The QN908x DK V1.2 board is shown in Fig 1. The detailed information is listed in Table

1.

Fig 1. Board overview

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Table 1. QN908x DK V1.2 board’s mark information list

Number

Name

Description

1

QN908x USB port

The QN908x USB port provides power supply to the whole

board and the USB signal path to the QN908x module.

2

LPC4322 USB port

The LPC4322 USB port provides power supply to the

whole board and the USB signal path is connected to

LPC4322.

3

LPC4322

LPC4322 works as the JTAG/SWD link bridge.

4

QN908x module

The QN908x module boards come in two types, according

to the QN908x chip package: HVQFN and WLCSP.

5

Jumper JP1

This jumper sets the JTAG/SWD link bridge target:

• Open: on-board target (default)

• Short: off-board target

6

Jumper JP5

This jumper sets the LPC4322 DFU mode:

• Short: DFU mode enabled

• Open: normal mode (default)

7

Jumper JP7

This jumper sets the QN908x module power supply

voltage:

• 1-2: 1.8 V power supply

• 2-3: 3.0 V power supply

8

Jumper JP8

This jumper sets the QN908x ISP UART path mode:

• Short: UART path enabled (default)

• Open: UART path disabled

9

Jumper JP11

This jumper sets the QN908x external I2C path mode,

• Short: I2C path enabled (default)

• Open: I2C path disabled

10

Header J5 and J7

QN908x GPIO for testing and compatible with the Arduino

board interface.

11

Header J4 and J6

QN908x GPIO for testing and compatible with the Arduino

board interface.

12

Jumper JP12, JP13,

JP14

These jumpers are used for the power consumption test.

13

Header J8

PMod interface connector, compatible with PMod.

14

Debugger

connector

Used to offer the JTAG/SWD interfaces to the off-board

target.

15

Jumper JP2

This jumper sets the QN908x power supply source;

on-board power or EXT power.

16

Button3 SW3

Button3 resets the QN908x chip.

17

Button1 SW1

Button1 is a function button defined by the user.

18

Button2 SW2

Button2 is a function button defined by the user.

19

Jumper JP15

Jumper used to enable the QN908x chip mode function.

20

GND Pin

GND pin used as the test ground pin.

21

Jumper JP16

Jumper used to cut off the USB leakage, when the DK

board is powered by a battery.

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2.2 Default jumper settings on the DK board

As shown in Fig 2, the power, JTAG/SWD, UART, and I2C enable jumpers are connected

by default. Table 2 and Table 3 show the jumpers’ functions and how to set them.

Fig 2. Board jumper default settings

Table 2. QN9080A MINIDK board’s default jumper settings

Jumper

Jumper setting

Function

JP2

Pin 1, 2 shorted

QN908x’s on-board power

JP7

Pin 2, 3 shorted

QN908x’s power (3 V)

JP8

Pin 1, 2 shorted

UART path enabled

JP11

Pin 1, 2 shorted

I2C path enabled

JP16

Pin 1, 2 shorted

When the DK board is powered by a

battery, leave it open.

2.3 CMSIS-DAP debugger

The CMSIS-DAP debugger provides both the SWD/JTAG and UART interfaces. You

may download or update the firmware into the QN908x device using the UART or

JTAG/SWD interfaces. There is a debugger connector to program and debug an

off-board target (shown in Fig 3).

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Fig 3. J-Link connector

2.4 QN9080 module

The QN908x IC integrates the BLE radio, controller, protocol stack, and profile software

on a single chip, which provides a flexible and easy way to use the BLE SoC solution. It

also includes a high-performance MCU (32-bit ARM® Cortex®-M4F), on-chip memory,

and peripherals for users to develop a truly single-chip wireless MCU solution.

The QN9080 module is shown in Fig 4.

Fig 4. QN9080 module board

The QN908x module has a MIFA antenna on the front side of the board. Therefore, it can

work without an external antenna. There is a RF connector that has a switch on the RF

front-end. You can easily perform the RF test by connecting an RF cable to the RF

connector.

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2.5 GPIO and Arduino interfaces

On the QN908x DK board, the J4, J5, J6, and J7 connectors all provide GPIO connection

outputs. The board is also compatible with the Arduino board interface. The interface

schematic is shown in Fig 5.

Fig 5. QN908x DK board GPIO and Arduino interface

2.6 QN908x reset button

The reset button is used to provide a hardware reset to the QN908x device, as shown in

Fig 6).

Fig 6. Reset button

2.7 ISP mode jumper

JP15 is the ISP mode jumper used to set the QN908x ISP mode. When the jumper is

shorted, the PB02 chip mode pin is connected to GND and this function is enabled.

When the jumper is open, the ISP mode function is disabled, as shown in Fig 7.

Fig 7. Chip mode jumper

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2.8 JTAG interface

The board provides a SWD/JTAG interface to be used by an external debugger, as

shown in Fig 8.

Fig 8. JTAG interface

2.9 Buttons

As shown in Fig 9, the DK board offers three buttons. When using the SW1 and SW2

buttons, the GPIO must be configured as the input. The logic LOW input is applied to the

GPIO when a button is pressed.

Fig 9. Buttons

The SW3 button is used to reset the QN908x chip. Press the button to reset the QN908x.

2.10 LED

The board offers a 3-color RGB LED. The connections are shown in Fig 10. The LED

lights up when the corresponding GPIO outputs switch to the logic high level. The GPIO

control pins are QN_PA13, QN_PA25, and QN_PA31. The GPIO QN_PA13 can work in

the PWM out mode. Therefore, the brightness of the LED can change with the PWM

pulse width.

Fig 10. LED

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3. DK board application function

3.1 CMSIS-DAP interface

The QN908x DK V1.2 board offers the JTAG/SWD interface either to the on-board or

off-board QN908x targets. It also provides the USB-to-UART interface for QN908x.

3.1.1 CMSIS-DAP to on-board QN908x

When programing or debugging a QN908x device using the CMSIS-DAP interface, JP1

and JP2 must be configured according to Table 3.

Table 3. ISP mode jumper setting

JP1

Open, CMSIS-DAP target is on-board QN9080

JP2

Short pin 1, 2, QN908x power enable

When downloading firmware into the QN908x with the ISP mode, enable the UART path

and set the chip mode pin to ground. The jumper setting is shown in Table 4.

Table 4. ISP mode jumper setting

JP8

Short, UART path enable

JP15

Short, ISP mode enable

The ISP download operation flow is shown in Fig 11.

Fig 11. ISP download operation flow

After the ISP download operation, move the jumper cap on JP15 away and leave JP15

open. Then, the QN908x chip can go into the normal mode normally.

3.1.2 CMSIS-DAP to off-board target

When using the QN908x DK board to program or debug off-board targets by the

JTAG/SWD interface, JP1 and JP2 must be configured according to Table 5.

Table 5. ISP mode jumper setting

JP1

Short, CMSIS-DAP target is off-board target

JP2

Short pin 2,3, 3 V power disable on JTAG/SWD connector

3.2 Current consumption test

The QN908x DK board provides two ways to measure the QN908x chip current

consumption. One way is to measure the current by the on-board precise resistor used

for the I-to-V conversion. The small voltage signal is amplified by the operation amplifier

and fed to the ADC. Then, it can be calculated by LPC4322 and shown in the

MCUXpresso IDE. Another way is to measure the current by an external ammeter on

jumper JP14.

UART

Enable

Short ISP

Jumper

ISP

Loading

Press QN908x

RST Button

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3.2.1 Current test using LPC4322

The QN908x DK board has an on-board current measurement circuit consisting of the

MAX9634T (U18) current monitor chip and the 12-bit ADC (ADC122S021, U19) with a

12-bit sampling from 50 ksps to 200 ksps. The on-board MAX9634T current monitor

measures the voltage across the QN908x VCC V-sense resistors; either 8.24 Ω or

4.12 Ω if JP13 is installed. MAX9634 multiplies the sense voltage 25 times to provide a

voltage range suitable for the ADC to measure.

A 2-input analog mux is used to select the channel to be measured; either the QN9080 or

the devices from the expansion board on the DK extension connectors. The current

measurement circuit is controlled by the Link2 processor and is not user-programmable.

The power-measurement utilities with this feature are available only after installing the

MCUXpresso IDE.

Due to the input offset voltage variations in MAX9634, the current measurement circuit is

not recommended for measuring currents below 150 A.

The QN908x current can be measured by the voltage across a sense resistor in series

with the supply. The voltage across a series 4.12-Ω resistor with the target QN908x VCC

can be manually measured at JP12 on the PCB. Use the Ohm’s law to calculate the

current (QN908x current = measured voltage / 4.12 Ω). As an example, if the measured

voltage is 10 mV, then 10e-3 / 4.12 Ω = 2.44 mA. Note that the current consumed by

MAX9634 used in the on-board current measurement is included in the voltage

measured on this resistor. The detailed schematic is shown in Fig 12.

Fig 12. Current test using the LPC processor

When performing the current test using the Link2 processor, jumpers JP12, JP13, and

JP14 must be set according to Table 6 .

Table 6. Current test jumper setting

JP12

Open when used for the Link2 processor current test

JP13

Open when used for the Link2 processor current test

JP14

Short when no digital ammeter series in

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3.2.1 Current test using a digital ammeter

When performing the current test using an external digital ammeter, jumpers JP12, JP13,

and JP14 must be set according to Table 7. Use a jumper cap to short the pins. The

schematic is shown in Fig 13.

Fig 13. Current test using an ammeter

When performing the current test using an ammeter, jumpers JP12, JP13, and JP14

must be set according to Table 7.

Table 7. Current test jumper setting

JP12

Short, when used for Ammeter current test

JP13

Short, when used for Ammeter current test

JP14

Need an ammeter series in

3.2.2 Current test using a DC power analyzer

Measure the current using a DC power analyzer in these two ways: one way is to use the

DC power analyzer as an ammeter that shares the same settings as the ammeter test,

and the other way is to use the DC power analyzer as the power supply for the DUT.

In this case, the QN9080 module is powered by the DC power analyzer. The QN_VCC

power pin is on jumper JP14, where a triangle symbol indicates the pin. The GND pin

near jumper JP2 can be also used as the power ground.

Fig 14. QN_VCC power pin

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3.3 RF connective test with CBT

The QN908x module RF signal can be tested by the on-trace RF connector. This RF

connector is manufactured by Murata. When performing the RF test with the CBT

instruments system, you may need an expansion board to match the signal voltage level

from UART to the RS232 interface. The RS232 expansion board can be powered from

the QN908x DK Board through connectors. The connection of the two boards is shown in

Fig 15.

Fig 15. RF CBT test with the expansion board

Before the RF test, download the Controller Mode binary file to the QN908x module to

put the QN908x into the DTM mode. Connect an RF cable from the QN908x module to

the CBT and set the CBT RS232 baud rate to 115200 bit/s. After that, start the RF test.

4. QN9080 USB dongle

4.1 Dongle hardware

Fig 16. Dongle hardware

The USB dongle works together with the QTool and behaves either as a master or as a

slave when talking to the QN908x DK or other devices. As shown in Fig 17, the USB

dongle receives commands from QTool via a virtual COM port, which initializes the

QN9080 dongle either as a master or slave device. All tests can be performed by QTool

after the initialization.

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4.2 Dongle connection

The QN9080 USB dongle is a USB-interfaced device with the QN9080 built in. With the

driver and SDK installed on your computer (see the QN9080 quick start guide), use the

QTool in SDK to control the QN9080 in the dongle to work as a central/peripheral device.

The DK board is supplied from the USB port and works as a peripheral/central device.

The dongle connection is illustrated in the below figure. See the QTool User Manual for

information about the QTool usage.

5. Appendix

5.1 Schematics

5.1.1 QN908x DK main board

The QN908x DK V1.22 board schematic has five parts: power, LPC processor,

QN908x-BLE, QN908x-function, and Arduino interface.

Fig 17. Power schematic of the QN908x DK board

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Fig 18. LPC processor schematic of the QN908x DK board

Fig 19. QN908x-BLE schematic of the QN908x DK board

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Fig 20. QN908x-function schematic of the QN908x DK board

Fig 21. Arduino interface schematic of the QN908x DK board

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5.1.2 QN9080 module board

Fig 22. QN9080 QFN module board

5.2 PCB layout

5.2.1 QN908x DK main board

Fig 23. Top etch

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Fig 24. GND plane

Fig 25. PWR plane

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Fig 26. Bottom etch

Fig 27. Top silkscreen

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Fig 28. Bottom silkscreen

5.2.2 QN9080 QFN board

Fig 29. Top etch

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